E-commerce sales for U.S. retailers grew 13.6 percent to $261 billion in 2013, up from a revised $229 billion in 2012, according to the latest annual report from the U.S. Census Bureau. Taken from a compilation of survey data, the E-Stats 2013: Measuring the Electronic Economy report shows retail sales accounted for 5.8 percent of total sales in 2013, up from 5.3 percent in 2012.Read the full article